Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0246 PM CDT Mon Apr 20 2026

Valid 202000Z - 211200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe storms are not expected today.

...20Z Update...
The TSTM area over the coast of southern New England and the
Mid-Atlantic was removed, as large-scale forcing for ascent and
related thunderstorm activity has shifted offshore. Elsewhere, the
previous forecast remains on track.

..Weinman.. 04/20/2026

.PREV DISCUSSION... /ISSUED 1052 AM CDT Mon Apr 20 2026/

...Synopsis...
An upper impulse will continue to pose a risk of scattered
thunderstorms over parts of NM and south/west TX through the
afternoon, with activity spreading into north-central TX late
tonight.  

Other thunderstorms are possible this afternoon and evening over
south FL in a moist and marginally unstable air mass, along the
coast of southern New England, and over portions of OR/WA.  In all
areas, weak instability will preclude the risk of organized severe
storms.